Mat Board Center Premier Crescent Acid-Free Pre-Cut 11x14 White Picture Mat Sets. Includes a Pack of 25 White Core Bevel Cut Matte for 8x10 Photos, Pack of 25 Backers and 25 Clear Bags Set of 25 pieces of 11x14 Picture Mattes for 8x10 Photos with 25 backing boards and 25 crystal clear sleeve folding flap bags. Premium High Quality Mattes, Backers & Plastic Sleeve's that are all Made in the USA by Crescent. The opening size is 7.5"x9.5" for 8x10 photo prints. Color: White The mats are beveled cut with white core and 4-ply thick (about 1.4 mm or 1/16 inch), The backing is white on both sides. The re-sealable adhesive strip of the clear bag is below the opening of the bag instead of on the flap.